Drill-steel chuck for stoneworking-machines.



c. 0'. HANSEN. DRILL STEEL CHUCK FOB. STONEWORKING MACHINES.

1,009,303. Patented Nov. 21, 1911.

UNITED STATES PATENT OFFICE.

CHARLES C. HANSEN, OF EASTON. PENNSYLVANIA, ASSIGNOR TO INGERSOLL-R-ANDCOMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

DRILL-STEEL CHUCK FOR STONEWORKING-MACHINES Specification of LettersPatent.

Patented NOV. 21, 1911.

Original application filed January 20, 1909, Serial No. 473,359. Dividedand this application filed June 2,

T 0 all whom it may concern:

Be it known that 1, CHARLES C. HANSEN, a citizen of the'United States,and resident of Easton, in the county of Northampton and State ofPennsylvania, have invented a new and useful Improvement in Drill-SteelChucks for Stoneworking-Machines, of which the following is aspecification.

My invention consists in certain improvements in the construction, formand arrangement of the several parts of a drill steel chuck whereby afluid-tight packing may be provided for the hollow drill steel and meansmay be provided for facilitating the removal of the packing from thechuck.

In the accompanying drawings, Figure 1 represents in longitudinalcentral section so much of a drill steel and its chuck as will give aclear understanding of this invention, Fig. 2 is a similar view with thedrill steel removed, Fig. 3 is a longitudinal central section throughthe elastic washer which forms the fluid-tight packing for the drillsteel, and Fig. 4 is a similar view through an elastic washer having amodified form of circumferential bead.

The drill steel is denoted by 1 and its longitudinally arranged axialbore is denoted by 2. The drill steel receiving chuck is denoted by 3and its socket is denoted by 4. A longitudinally arranged axial bore 5leads rearwardly from the bottom of the socket 4. A hollow thrust block6 is removably seated in the bottom of the drill steel receiving socket4, which thrust block is provided with a tapered centrally arranged lug7 arranged to enter a centrally arranged flaring seat 8 at the bottom ofthe socket 4, so as to center the bore 9 through the block 6 withrespect to the bores 2 and 5 in the drill steel and chuck respectively.This thrust block 6 is preferably made of wear resisting material andeliminates the wearing away of the bottom of the socket 4 in the chuck,as has heretofore been common due to its engagement with the inner endof the drill steel. When one of these thrust blocks has become worn, itmay be readily replaced by another.

A fluid-tight packing for the hollow drill steel is provided in thesocket 4 of the chuck, which packing comprises an elastic washer 10having a circumferential bead 11 adapted to fit into an annular recess12 in the socket 4 at a short distance in front of the removable thrustblock 6. A hollow bushing 13 extends from the outer end of the elasticwasher10 to the outer end of the chuck.

This elastic washer 10 has a circumferentially contracted bore so thatwhen the drill steel is inserted into position within the socket in thechuck, the walls of the washer will be forced outwardly so as to form afluid tight packing between the drill steel and the walls of the socket4. In the present instance, this contracted bore is formed by taperingthe bore from end to end of the washer and the circumferential bead islocated at the enlarged end of the bore.

The chuck is provided with a transverse hole 14 leading to the elasticwasher 10 for permitting the removal of the gasket when it becomes wornout. This removal may be accomplished by inserting a pin or other deviceinto the hole 14 and pushing the washer inwardly until it may bewithdrawn through the socket 4 by a hook inserted into the socket fromthe front end thereof. In Figs. 1, 2 and 3, I have shown the elasticwasher as provided with a circumferential bead half round in crosssection while in Fig. 4, this circumferential bead is shown as angularin cross section, as shown at 15. It is to be understood that this beadand its corresponding recess in the socket of the chuck may be. made ofany desired form which will hold the washer in position within thesocket.

The thrust block shown and described but not claimed herein, forms thesubject-matter of my application filed January 20, 1909, Serial No.473,359, of which the present application is a division.

What I claim is:

1. In combination, a chuck having a drill steel receiving socket thereinand an elastic washer,'said washer having anormally contracted bore forforming a fluid-tight packing for the drill steel.

2. In combination, a chuck having a drill steel receiving socket thereinprovided with 4 an annular recess, and an elastic washer having acircumferential bead located in said annular recess, said washer havinga normally contracted bore for forming a fluidtight packing for thehollow drill steel.

3. A fluid-tight packing for drill steels comprising an elastic Washerhaving a normally contracted bore.

4:. A fluid-tight packing for drill steels comprising an elastic Washerhaving a normally contracted bore and a circumferential bead.

A fluidtight packing for drill steels comprising an elastic Washerhaving its bore tapered and provided With a circumferential bead at theenlarged end of the bore.

6. In combination, a chuck having a drill receiving socket thereinprovided With an annular recess, an elastic Washer having acircumferential bead located 1n said recess,

the said chuck having a transverse hole leading to the Washer forfacilitating its removal from the chuck.

In testimony that I claim the foregoing as my invention, I have signedmy name in presence of two Witnesses, this twenty-ninth day of May,1911.

CHARLES C. HANSEN.

Witnesses:

F. GEORGE BARRY, HENRY C. THIEME.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, .D. C.

